I have an 83 300D with 205,000 on the clock. Can anyone tell me if the flaring from 3 - 4th gear is a true sign that the trans is tired? What should I try in the vacuum adjusting sequence to see if I can get the shifting better. I have read many articles on proper adjustment and have checked all of the vacuum values. I have good vacuum, the modulator is adjusted properly, etc. It shift fine in all the other gears except 3 to 4th. Does lengthening or shortening the Bowden cable have any affect on the flare?